History of the Peloponnesian War

And Homer proves this most fully; for, though born long after the Trojan war, he has no where called them all by that name, nor indeed any others but those that came with Achilles out of Phthiotis; who were the very original Hellenes; but in his poems he mentions Danaans, Argives, and Achaeans. Nor again does he speak of barbarians; because neither were the Hellenes, in my opinion, as yet distinguished by one common term in opposition to that.